Khorramabad pronunciation (Persian: خرمآباد - also Romanized as Khorramābād, Khoramabad, Khurramabad, Khorram Abad and Khur Ramābād) is a city in and capital of Lorestan Province, Iran. At the 2006 census, its population was 328,544, in 75,945 families. Khorramabad is situated in the Zagros Mountains. Khorramabad Airport is 3 km south of the city proper. The city population is predominantly Lur and Lak, although the two groups are closely related. Although not a major tourist destination, it is quite scenic and possesses several attractions, such as 5 Paleolithic cave-dwelling sites. In the city center, a tall citadel called Falak-ol-Aflak (The Heaven of Heavens), a relic of the Sassanid era, is now a nationally popular museum. Economically, it is the regional base of the agricultural industry.